Hadoop General Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Hadoop General Interview Questions

Questions Answers Views Company eMail

What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

444

Which directory does hadoop install to?

485

Why use hadoop?

436

What are the actions followed by hadoop?

466

What kind of hardware is best for hadoop?

418

Where are hadoop’s configuration files located and list them?

447

How jobtracker assign tasks to the tasktracker?

412

What are the functionalities of jobtracer?

409

What does rack awareness mean?

411

What the information segments utilized by hadoop are?

417

Clarify what a task tracker is in hadoop?

427

How ordering in hdfs is finished?

424

Clarify what is sequence file input format?

527

How job tracker schedules an assignment?

412

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

428

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Un-Answered Questions { Hadoop General }

What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?

452

What is a record reader?

407

What is Disk Balancer in Hadoop?

513

Can I set the number of reducers to zero?

397

What are the main components in Hadoop Eco-System and what are their functions ?

493

How to use combiner in hadoop ?

445

What is structured and unstructured data?

446

Which port does SSH work on?

405

What happens if the number of reducers is 0 in Hadoop?

481

How often do you need to reformat the namenode?

511

What are the actions followed by hadoop?

466

Give me the examples of Columnar database ?

584

What are the side data distribution techniques?

478

How to do ‘map’ and ‘reduce’ works?

572

What are the port numbers of namenode?

425

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